Why Is Reverse Grouping Not Performed on Cord Blood Specimens

question 23

Multiple Choice

Why is reverse grouping not performed on cord blood specimens?

• A) Antigens are not present at birth.
• B) Antibodies are generally not present at birth.
• C) Antibody titer is too high.
• D) Antigens are too weak.

---

Definitions:

Mechanoreceptors

Sensory receptors sensitive to mechanical pressures or changes, involved in sensations such as touch, pressure, and sound.

Meissner Corpuscles

Specialized nerve endings in the skin responsible for sensitivity to light touch.

Two-Point Discrimination

The ability to discern two separate points of contact on the skin, a measure of tactile sensory resolution.

Dermal Papillae

Small, nipple-like extensions of the dermis into the epidermis that increase surface area for oxygen and nutrient transfer between these layers.